What do the symbols appearing above game locations mean?

The symbols and the color highlights above the game locations shows you what quests and missions are available in this location at the moment. Yellow highlighting denotes available quests, blue is for missions and red is for heroic missions.A symbol above the location shows the main goal of the quest available there. For example, if you see a coin symbol, this means your quest is to gather coins; if you see crossed swords you’re your aim is to kill enemies, and so on.